The float valve, also known as the valve or fill valve, is the accessory that fills your toilet after a flush. After the water leaves the tank, the float valve, normally in place by the water in the tank, decreases, allowing water to flow to it. When the float valve reaches a set height, the water flow to the fill valve is cut off. The replacement of a toilet or float valve involves draining the toilet so that it can reach the valve, remove it and replace it with a new one.
Toto CST794EFRNo.01 Elongated Bowl and Tank with Right Hand Trip Lever 1.28-GPF, Nexus Collection, Cotton
Instructions
1 Close the water for the toilet in which you will replace the toilet valve and float valve. This is usually behind the toilet on the wall. The supply shutoff valve will be round or oval. Turn this clockwise to close the water supply.
2 Pull the chain. Hold the handle down until all the water supply is gone. Wipe away any excess with a towel and sponge.
3 Disconnect the float valve lever from the fill valve. This could be held in place with a screw or snapped into place, depending on the model.
4 Disconnect the water supply valve from the inlet of the filling valve by unscrewing it. Unscrew the plastic retaining screw above the filling valve inlet. This keeps the fill valve in place in the bottom of the tank. Lift the fill valve and out of the tank.
5 Turn the new fill valve upside down. Apply a thin layer of grease to the bottom of the filler valve gasket. Turn the filling valve right side up. Insert into the tank so that the seal is flush with the bottom of the tank. Keep holding this in one place with your hand.
6 Reattach the retaining screw to the bottom of the tank by screwing it around the tank inlet. Tighten with the key.
7 Replace the float valve.
8 Wrap the inlet threads with plumber's tape. Replace the water inlet coupling.
9 Reset the water supply. Let the tank fill up. Rinse and check correct operation.
Tips and warnings
- If possible, try replacing the fill valve that comes with an integrated float valve.